1. Core Overview & Target Application Brief

This comprehensive spare parts catalog is precision engineered exclusively for the GE Frame 6B PG6551 B Gas Turbine (Serial Numbers T781 and T782), manufactured by GEC Alsthom France, a heavy-duty industrial gas turbine designed for power generation, mechanical drive, and oilfield gas compression operations. Tailored to the specialized needs of gas turbine maintenance engineers, power plant technicians, reliability managers, oil & gas operations supervisors, and industrial service contractors, this parts suite directly addresses the most costly and disruptive field pain points: unplanned turbine shutdowns, fuel system leaks, lube oil contamination, control system signal drift, filter clogging, and premature wear of critical rotating and hydraulic components.

2. Detailed Product & Component Specifications

The GE Frame 6B PG6551 B spare parts line features heavy-duty, high-temperature resistant mechanical, hydraulic, fuel, lube, and control components built to withstand extreme operating conditions: continuous combustion temperatures up to 1100°C, hydraulic pressures up to 500 bar, high-speed rotational forces, and exposure to fuel oil, lube oil, and industrial gases. Each part—spanning fuel nozzles, servo valves, filter cartridges, bearings, thermocouples, Mark V control cards, Viton O-rings, and lube oil pumps—is crafted from premium materials: heat-resistant alloy steels for rotating components, Viton fluoroelastomer seals for high-temperature sealing, 5-micron precision filtration media for contamination control, and industrial-grade electronics for stable control system operation. All critical parts are machined to a dimensional accuracy of ±0.001 inches, ensuring direct interchangeability with original GE Frame 6B hardware without modification.

2.2 Key Functional Specifications

• Fuel System Performance: 3-coil servo valves (1 gpm/5 gpm) deliver 0.01-second response time for precise fuel flow regulation; dual fuel nozzle assemblies ensure stable combustion across fuel oil and gas operating modes.
• Lube & Hydraulic System Reliability: 5-micron filter cartridges maintain lube oil cleanliness to ISO 4406 Class 8/9 standards; high-pressure fuel pumps operate at 350 bar with 99.5% volumetric efficiency.
• Wear & Temperature Life Metrics: Precision bearings support 60,000+ operating hours of high-speed rotation; Viton O-rings (90 Durometer) withstand 250°C continuous temperatures; filter cartridges provide 2,000+ hours of contamination control.
• Control System Accuracy: Mark V control cards, magnetic pickups, and thermocouples offer ±0.1% temperature and speed measurement precision, matching the OEM GE control system performance.

2.3 Structural Design Features

• OEM Direct Interchangeability: Every part fits the original GE Frame 6B PG6551 B mounting, hydraulic, fuel, and electrical connection specifications, cutting repair and installation time by up to 50% in remote power generation sites.
• Modular Component Design: Pre-assembled fuel nozzles, valve kits, and filter cartridges streamline complex overhauls, even with limited on-site technical support.
• High-Temperature Sealing: Viton O-rings and spiral-wound gaskets eliminate fluid leaks in high-heat turbine compartments, a top failure mode for industrial gas turbines.
• Contamination Resistance: Multi-stage filtration systems and sealed bearing assemblies prevent lube oil and fuel contamination, extending component lifespan.

2.4 Applicable Operating Conditions

These GE Frame 6B spare parts are optimized for reliable performance across core industrial scenarios, including:

• GE Frame 6B PG6551 B Gas Turbines (Serial Numbers T781 & T782, GEC Alsthom France manufactured)
• Industrial power generation, oilfield gas compression, and mechanical drive applications
• Dual fuel (fuel oil/gas) combustion operations

2.5 Proactive Maintenance & Service Recommendations

To maximize the lifespan of the GE Frame 6B PG6551 B Gas Turbine and avoid costly downtime, follow these industry-approved maintenance protocols using this parts catalog:

• 1000-Hour Inspection: Check fuel nozzle wear, inspect lube oil filter clogging, test thermocouple and magnetic pickup functionality, and tighten hydraulic/fuel line connections.
• 5000-Hour Service: Replace 5-micron filter cartridges, swap worn Viton O-rings and gaskets, calibrate servo valves and pressure switches, and lubricate bearing assemblies.

We supply the following spare parts:

No.	Description	Part No.
1	flow divider without motor	91419375P006
2	PICKUP , MAGNETIC	185A1117P011
3	SELECTOR VALVE	306A4576P001
4	fuel oil pump	302A7009P009
5	coupling rigid for HP pump	91412890P001
6	coupling flexible for HP pump	295A9440P003
7	torque convertor	91470193P003
8	coupling A.A. compress.	187C8260P001
9	servo valve 3 coil 1 gpm	312A6077P005
10	servo valve 3 coil 5 gpm	312A6077P004
11	main pump cooling water	H1978A006
12	Atomizing air compressor booster	298A7 661P003
13	Atomizing air compressor main	302A1537P001
14	fuel check valve	9147293P002
1	Conical filter	GI3436/584
2	Cylindrical filter	GI3437/58
3	FILTER ELEMENT	315A2660P003
4	FILTER ELEMENT	91600716P001
5	FILTER CARTRIDGE HYDR. RATCHET	225A9753P002
6	FILTER CARTRIDGE 5 MICRON	342A2581P003
7	FILTER CARTRIDGE 5 MICRON	328A7132P001
8	FILTER CARTRIDGE HYDROLIC	258A4860P002
9	PORO STONE ELEMENT	91400425P004
10	OIL MIST FILTER S.A.I SPECIAL CAOLESCING CARTARIDGE FIBERGLASS 486
1	THERMOSTAT	91402163P002
2	THERMOMETER	272A6619P003
3	THERMOMETER	272A6619P008
1	O RING VITON 90DUR	185A1343P221
2	VALVE	235A8171P001
3	SEAT VALVE	235A8172P001
4	GLAND	114A5608P001
5	SPRING CARBON STEEL	114A5609P001
6	SPRING SEAT	113Y687P001
7	RING SEAL	113Y249P001
8	GARLOCK CLOSURE	114A5747P001
9	PISTON RING	299A114P012
10	GASKET	318A9751P017
11	GASKET	299A247P013
12	LIMIT SWITCH EP	328A7435P001
13	LEVER SWITCH LIMIT ACTUATER	197B6824P001
14	O RING VITON 75 DUR	185A1354P141
fuel nozzle assembly – duel fuel		91021812G40
1	nozzle tip assembly	91170529G02
2	cone mach-fuel nozzle	251B1572P001
3	swirler air	207C3768P001
4	cartridge assembly – fuel nozzle	227C5795G01
5	locking plate	287A1683P008
6	gasket metal seal	315A4069P003
7	washer	355A7386P002
By-Pass Asm. Fuel -Oil		91050843G01
1	hydraulic cylinder	91400771P001
2	O-ring Viton 90 DUR	185A1343P012
3	O-ring Viton 90 DUR	185A1343P130
4	plug valve	235A9006P001
5	seat	205B3038P001
6	O-ring Viton 90 DUR	185A1343P905
7	O-ring Viton	185A1354P222
8	valve	286A6668P001
9	O-ring Viton	185A1343P117
10	hydraulic filter	315A2660P003
11	servo valve 3 coil 1 gpm	312A6077P005
1	control module VH-14	H3733A002
2	Pressure relief valve VR-5	H3739A001
3	Filter Cartridge	91600716P001
4	check valve	114A37549006
5	hydraulic ratchet pump	277A2906P001
1	magnetic pickup	185A1117P008
2	magnetic pickup	185A1117P012
3	solenoid valve	226A1413P001
4	speed regulator asm	853E964G01
5	servo valve 3 coil 5 gpm	312A6077P004
6	HYDROLIC VALVE ASM.	145C4491G05
7	TEMPERATURE SWITCH	213B1653P001
1	clutch jaw	91417163G01
2	clutch	141D7148P002
3	ball bearing	286A6672P001
4	actuator switch	205B3031P001
5	lock nut	286A6675P001
6	limit switch	328A7435P001
7	hydraulic cylinder	286A6673P001
8	nut	286A6670P001
9	lever switch limit actuator	197B6824P001
1	linear position transducer	311A5178P006
2	hydraulic filter	315A2660P003
1	HYDROLIC MANIFOLD	277A2968P002
2	O RING VITON 90 DUR	185A13439012
3	check valve	277A2958P001
1	HALF BEARING	91600478P161
2	HALF BEARING	91600478P162
3	TRUST IN 2 PARTS	91600478P156
4	TRUST IN 2 PARTS	91600478P157
5	HALF BEARING	91600076P150
6	HALF BEARING	91600076P152
7	HALF BEARING	91600076P151
8	HALF BEARING	91600076P153
9	BEARING	91600095P155
10	BEARING	91600076P355
11	BEARING	91600076P356
12	LINE SHAFT NUMBER 1	91600478P601
1	Fuel oil pump	302A7009P009
2	PIN	91600576P201
3	DYNG SEAL	91600576P101
4	RETAINING RING	91600576P202
5	GASKET	91600576P102
6	ROTATING PART	91600576P203
7	HSNG IDLER BALL PISTON	91600576P204
8	HOUSING	91600576P205
9	SEAL	91600576P103
10	TUBE	91600576P206
11	GASKET “O” RING	91600576P104
12	GASKET “O” RING	91600576P105
13	THRUST CAGE	91600576P219
14	ROTATING PART	91600576P208
15	RING RETAINER	91600576P107
16	SPACER	91600576P209
17	BALL BEARING	91600576P106
18	HOUSING	91600576P210
19	ROTOR	91600576P211
20	PIN	91600576P212
21	PIN	91600576P213
22	HOUSING	91600576P214
23	BUSHING BALL PISTON	91600576P215
24	STOP IDLER	91600576P216
25	GASKET	91600576P108
LUBE OIL PUMP H.P.		255A4806P001
1	TUBING THERMOCOUPLE	205B3432P001
2	TUBING THERMOCOUPLE	205B3432P002
3	TUBING THERMOCOUPLE	205B3432P003
4	TUBING THERMOCOUPLE	205B3432P004
5	EXHUST THERMOCOUPLE	328A843P001
6	THERMOCOUPLE	351A3488P024
7	THERMOCOUPLE	351A3488P003
8	THERMOCOUPLE	328A8478P005
9	THERMOCOUPLE	351A3488P003
10	THERMOCOUPLE	328A8478P113
11	CONNECTION THERMOCOUPLE	287A1399P019
12	THERMOCOUPLE	328A8478P104
1	PRESSURE SWITCH DIFFRER.	286A6062P002
2	PRESSURE SWITCH EP	226A1706P029
3	PRESSURE SWITCH EP	226A1706P026
4	CHECK VALVE	91437293P002
5	BALL VALVE	302A1970P103
6	ADF GAUGE PRESSURE SWITCH	328A8482P008
7	VALVE ELECTRIC OPERATING	287A1496P027
1	GASKET , PIPE FLANGE	302A4597P106
2	WELL THERMOMETER	158A3783P101
3	GASKET , SPIRAL WOUND	302A4594P004
4	GASKET , SPIRAL WOUND	302A4594P006
5	GASKET , SPIRAL WOUND	302A4594P007
6	GASKET , SPIRAL WOUND	302A4594P009
7	GASKET , SPIRAL WOUND	302A4594P011
8	GASKET , SPIRAL WOUND	302A4594P014
9	GASKET , SPIRAL WOUND	302A4594P015
10	GASKET , SPIRAL WOUND	302A4594P016
11	GASKET , PIPE FLANGE	91411733P107
12	GASKET , PIPE FLANGE	302A4597P109
13	GASKET , SPIRAL WOUND	302A4597P110
14	GASKET , PIPE FLANGE	302A4597P111
15	GASKET , SPIRAL WOUND	302A4594P059
16	GASKET , SPIRAL WOUND	302A4594P003
17	GASKET , SPIRAL WOUND	302A4594P004
18	GASKET , SPIRAL WOUND	302A4594P026
19	GASKET , SPIRAL WOUND	302A4594P031
20	GASKET , SPIRAL WOUND	302A4594P033
21	GASKET , SPIRAL WOUND	302A4594P063
22	GASKET , PIPE FLANGE	302A4597P102
23	GASKET , PIPE FLANGE	302A4597P105
24	GASKET , PIPE FLANGE	302A4597P113
25	GASKET , SOLENOID VALVE	318A9710P001
26	VALVE , CHECK-ORFICE	256A1136P004
27	CHECK VALVE	114A3759P009
1	GASKET HEAT EXGHANGER	91429567P013
2	GASKET HEAT EXGHANGER	91429567P014
1	LUBE OIL PUMP	91450943P001
2	BEARING BUSH	91600620P107
3	LIP RING	91600620P555
4	ROLLER BEARING	91600620P562
5	ROLLER BEARING	91600620P563
6	COMPLET SHAFT	91600620P701
7	SHAFT  SLEEVE	91600567P702
8	NUT , WHEEL	91600567P704
9	BEARING SLEEVE	91600567P706
1	COUPLING , LUBE OIL PUMP	91460681P003
2	LUBE OIL PUMP	91450915P001
3	PADDLE WHEELE	91600569P102
4	WEAR RING	91600569P104
5	BEARING BUSH	91600569P107
6	BALL BEARING	91600569P562
7	COMPLETE SHAT	91600569P701
8	SHAFT SLEEVE	91600569P702
9	BEARING SLEEVE	91600569P706
10	COUPLING , LUBE OIL PUMP	91460681P002
1	WHEELE	91600205P003
2	STUFFING	91600205P009
3	GASKET , O RING	91600205P010
4	GASKET , O RING	91600205P011
1	GASKET , COVER	91600448P003
2	SPRING	91600113P005
3	CARTRIDGE FILTER 5 MICRON	328A7132P001
1	O RING VALVE PLUG	91600450P002
2	CARTRIDGE FILTER 5 MICRON	342A2581P003
3	O RING CENTER POST	91600450P001
1	STRAINER	91600538P003
2	GASKET COVER	91600538P004
1	CARTRIDGE FILTER 5 MICRON	328A7132P001
2	SPRING	91600113P005
1	SPRING	91600008P004
2	SOLENID ASSEMBLY	91600429P001
3	GASKET	91600008P033
4	REPAIR KIT	91600008P050
5	O RING VITON 90 DUR	185A1343P010
6	O RING VITON 75 DUR	185A13454P210
7	O RING VITON 75 DUR	185A13454P217
1	DIAPHRAGM	91400424Q002
1	O RING	91600627P003
2	O RING SEALS	91600582P013
1	THERMOSTATIC ASSEMBLY	91600471P001
1	THERMOSTATIC ASSEMBLY	91600542P001
LEVEL INDICATOR		256A1072P023
LEVEL INDICATOR		256A1072P024
1	GASKET O RING	91600396P02N
2	HYDROLIC FILTER	262A4713P001
1	O RING SEAL KIT	91600236P020
1	O RING SEALS	91600582P007
2	O RING SEALS	96100582P013
3	SOLENOID COIL	91600582P028
4	CUT – OUT SWITCH ASSY	91600049P033
5	SPARE PART KIT	91600582P100
1	FIRE DETECTOR HI TEMP	328A8092P001
1	THERMOSTAT	91402524P001
2	THERMOSTAT	91350658P001
3	THERMOSTAT	91402524P003
1	FIRE DETECTOR HI TEMP	328A8092P001
1	FIRE DETECTOR HI TEMP	328A8092P001
1	FLAME DETECTOR	261A1812P010
2	BOLT HEXA HEAD	N14BP35032
3	GASKET CARBON	324A9243P002
1	FLAME DETECTOR	261A1812P001
IGNITION TRANSFORMER		328A7327P002
1	INSULATION	287A1699P001
2	TERMINAL EXTENSION	158A3479P023
3	GASKET	184A8731P001
4	S[PARK OLUG CORE	298A8224P003
5	WASHER	298A8216P001
6	WASHER	298A8222P001
1	SENSOR VIBRATION / CABLE	328A7161P001
2	SENSOR VIBRATION / CABLE	328A7161P003
3	SENSOR VIBRATION / CABLE	328A7161P004
4	SCREW SOCK. HEAD	N170P13008
1	TUBING THERMOCOUPLE	287A7874G01
1	BOLT 12 PT 1” 8UNC	N733AP39056
1	TUBING THERMOCOUPLE	279A1763G01
1	LINER BEARING	172D7207G01
2	DEFLECTOR FWD-BRG 2	164C2819P001
3	SEAL STATIONARY BRG2	177D9845G01
1	SHIM	227B9156P003
2	SHIM	297A1620P001
3	BEARING UNLOUDING THRUST	164C2817G02
4	BEARING THRUST	314A5904P003
5	SET OF SHOES	91600661P001
1	INSULATION CUSHION	91308646G01
2	EXPANSION JOINT	279A1146P001
3	GASKET	279A1148P001
4	EXPANSION JOINT	279A2644P001
5	GASKET	279A2645P001
6	CLAMP SEG. RING CLINCHING	279A2641P001
7	STIRRUP	91424233P001
1	DS200TCTGG1AFF
2	DS200TCRAG1ACC
3	DS200TCCAG1BAA
4	DS215TCEAG1BZZ01A
5	DS215GASQG4AZZ01A
6	DS215TCQAG1BZZ01A
7	DS200TCDAG1BDB
8	DS200TCPSG1AME
9	DS200SDCCG1AFD
10	DS200TCEAG1BTF
11	DS200TCPDG1BCC
12	DS200TCQCG1BHF
13	DS200TCQAG1BED
14	DS200SDCCG4AFD

3. Field Fault Repair Cases (Real-World Scenarios)

3.1 Case 1: Fuel Servo Valve Failure (Power Generation Plant)

Issue: GE Frame 6B turbine experienced erratic fuel flow and unstable combustion, triggering an emergency shutdown. Root cause: Internal seal degradation of a 3-coil 5 gpm servo valve (312A6077P004) and pressure drift. Repair: Replaced the faulty servo valve, calibrated fuel pressure settings, and purged air from the fuel system. Outcome: Restored stable fuel flow, eliminated combustion fluctuations, and resumed full power generation.

3.2 Case 2: Lube Oil Filter Clogging (Gas Compression Site)

Issue: Turbine lube oil pressure dropped below threshold levels, activating a low-pressure alarm. Root cause: Clogged 5-micron lube oil filter cartridge (328A7132P001) and contaminated oil. Repair: Installed new filter cartridges, flushed the lube oil system, and replaced degraded oil seals. Outcome: Restored normal lube oil pressure, eliminated contamination risks, and prevented bearing damage.

3.3 Case 3: Thermocouple Signal Drift (Industrial Turbine Facility)

Issue: Turbine exhaust temperature readings were inaccurate, leading to incorrect control adjustments and reduced efficiency. Root cause: Failed exhaust thermocouple (328A843P001) and loose connection wiring. Repair: Replaced the faulty thermocouple, secured wiring connections, and recalibrated temperature sensors. Outcome: Restored precise temperature monitoring, optimized combustion efficiency, and cleared control system alarms.

4. Frequently Asked Questions (FAQ)

Question	Answer
Are these parts compatible only with GE Frame 6B PG6551 B (SN T781/T782)?	Yes, all components are engineered exclusively for this exact turbine model and serial numbers, matching GEC Alsthom France OEM specifications for perfect fit and performance.
Do these parts support the turbine’s Mark V control system?	Absolutely, this catalog includes genuine-equivalent Mark V control cards, sensors, and wiring components fully compatible with the GE Frame 6B’s control architecture.
What filter cartridge should I use for lube oil system maintenance?	Use 5-micron filter cartridges (part numbers 328A7132P001 or 342A2581P003) to meet ISO 4406 cleanliness standards for turbine lube oil systems.

5. Procurement Guidance & Call to Action

This GE Frame 6B PG6551 B Gas Turbine spare parts list serves as a dual-purpose industry resource: a strict procurement standard to guarantee part quality, OEM compatibility, and compliance with API 616 and ISO industrial turbine standards, and a practical technical reference to resolve mechanical, hydraulic, fuel, and control failures quickly and safely. Choosing these certified replacement parts minimizes unplanned power generation downtime, reduces long-term maintenance expenses, and preserves the reliable, efficient performance of your GE Frame 6B turbine.